1.Elasticity is too large, anti-noise Earplug oppression of the external auditory meatus skin can cause ear swelling, earache and other discomfort; flexibility is too small, can not be in close contact with the external auditory canal, noise reduction. Therefore, we must observe the earbuds rebound speed, rebound time is longer the better quality.

2.Softness

Softness directly affects the degree of comfort worn by the earplugs

3. surface texture

Some earplugs feel sticky, worn on the ear will stick to the ear canal skin, should try to avoid buying. The best way to identify the two earplugs is to stick together and then firmly separated to see the time they separated, the sooner the better.